#!/usr/bin/env python3 # # Copyright (C) 2019-2020 VyOS maintainers and contributors # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 or later as # published by the Free Software Foundation. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . import os from sys import exit from netifaces import interfaces from vyos.config import Config from vyos.configdict import get_interface_dict from vyos.configdict import node_changed from vyos.configdict import is_member from vyos.configdict import is_source_interface from vyos.configdict import has_vlan_subinterface_configured from vyos.configdict import dict_merge from vyos.configverify import verify_dhcpv6 from vyos.configverify import verify_vrf from vyos.ifconfig import BridgeIf from vyos.validate import has_address_configured from vyos.validate import has_vrf_configured from vyos.xml import defaults from vyos.util import cmd from vyos.util import dict_search from vyos import ConfigError from vyos import airbag airbag.enable() def get_config(config=None): """ Retrive CLI config as dictionary. Dictionary can never be empty, as at least the interface name will be added or a deleted flag """ if config: conf = config else: conf = Config() base = ['interfaces', 'bridge'] bridge = get_interface_dict(conf, base) # determine which members have been removed tmp = node_changed(conf, ['member', 'interface'], key_mangling=('-', '_')) if tmp: if 'member' in bridge: bridge['member'].update({'interface_remove': tmp }) else: bridge.update({'member': {'interface_remove': tmp }}) if dict_search('member.interface', bridge) != None: # XXX: T2665: we need a copy of the dict keys for iteration, else we will get: # RuntimeError: dictionary changed size during iteration for interface in list(bridge['member']['interface']): for key in ['cost', 'priority']: if interface == key: del bridge['member']['interface'][key] continue # the default dictionary is not properly paged into the dict (see T2665) # thus we will ammend it ourself default_member_values = defaults(base + ['member', 'interface']) for interface,interface_config in bridge['member']['interface'].items(): bridge['member']['interface'][interface] = dict_merge( default_member_values, bridge['member']['interface'][interface]) # Check if member interface is already member of another bridge tmp = is_member(conf, interface, 'bridge') if tmp and bridge['ifname'] not in tmp: bridge['member']['interface'][interface].update({'is_bridge_member' : tmp}) # Check if member interface is already member of a bond tmp = is_member(conf, interface, 'bonding') if tmp: bridge['member']['interface'][interface].update({'is_bond_member' : tmp}) # Check if member interface is used as source-interface on another interface tmp = is_source_interface(conf, interface) if tmp: bridge['member']['interface'][interface].update({'is_source_interface' : tmp}) # Bridge members must not have an assigned address tmp = has_address_configured(conf, interface) if tmp: bridge['member']['interface'][interface].update({'has_address' : ''}) # Bridge members must not have a VRF attached tmp = has_vrf_configured(conf, interface) if tmp: bridge['member']['interface'][interface].update({'has_vrf' : ''}) # VLAN-aware bridge members must not have VLAN interface configuration tmp = has_vlan_subinterface_configured(conf,interface) if 'enable_vlan' in bridge and tmp: bridge['member']['interface'][interface].update({'has_vlan' : ''}) # delete empty dictionary keys - no need to run code paths if nothing is there to do if 'member' in bridge: if 'interface' in bridge['member'] and len(bridge['member']['interface']) == 0: del bridge['member']['interface'] if len(bridge['member']) == 0: del bridge['member'] return bridge def verify(bridge): if 'deleted' in bridge: return None verify_dhcpv6(bridge) verify_vrf(bridge) ifname = bridge['ifname'] if dict_search('member.interface', bridge): for interface, interface_config in bridge['member']['interface'].items(): error_msg = f'Can not add interface "{interface}" to bridge, ' if interface == 'lo': raise ConfigError('Loopback interface "lo" can not be added to a bridge') if 'is_bridge_member' in interface_config: tmp = next(iter(interface_config['is_bridge_member'])) raise ConfigError(error_msg + f'it is already a member of bridge "{tmp}"!') if 'is_bond_member' in interface_config: tmp = next(iter(interface_config['is_bond_member'])) raise ConfigError(error_msg + f'it is already a member of bond "{tmp}"!') if 'is_source_interface' in interface_config: tmp = interface_config['is_source_interface'] raise ConfigError(error_msg + f'it is the source-interface of "{tmp}"!') if 'has_address' in interface_config: raise ConfigError(error_msg + 'it has an address assigned!') if 'has_vrf' in interface_config: raise ConfigError(error_msg + 'it has a VRF assigned!') if 'enable_vlan' in bridge: if 'has_vlan' in interface_config: raise ConfigError(error_msg + 'it has VLAN subinterface(s) assigned!') if 'wlan' in interface: raise ConfigError(error_msg + 'VLAN aware cannot be set!') else: for option in ['allowed_vlan', 'native_vlan']: if option in interface_config: raise ConfigError('Can not use VLAN options on non VLAN aware bridge') if 'enable_vlan' in bridge: if dict_search('vif.1', bridge): raise ConfigError(f'VLAN 1 sub interface cannot be set for VLAN aware bridge {ifname}, and VLAN 1 is always the parent interface') else: if dict_search('vif', bridge): raise ConfigError(f'You must first activate "enable-vlan" of {ifname} bridge to use "vif"') return None def generate(bridge): return None def apply(bridge): br = BridgeIf(bridge['ifname']) if 'deleted' in bridge: # delete interface br.remove() else: br.update(bridge) return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)